updating usage for runc and runc commands

Signed-off-by: Mike Brown <brownwm@us.ibm.com>

delete.go

@@ -5,6 +5,15 @@ import "github.com/codegangsta/cli"
 var deleteCommand = cli.Command{
 	Name:  "delete",
 	Usage: "delete any resources held by the container often used with detached containers",
+	ArgsUsage: `<container-id>
+
+Where "<container-id>" is the name for the instance of the container.
+	 
+For example, if the container id is "ubuntu01" and runc list currently shows the
+status of "ubuntu01" as "destroyed" the following will delete resources held for
+"ubuntu01" removing "ubuntu01" from the runc list of containers:  
+	 
+       # runc delete ubuntu01`,
 	Action: func(context *cli.Context) {
 		container, err := getContainer(context)
 		if err != nil {